I ended up going out and buying a new speed feed because I need it for an event this weekend. Sucks to have to spend more money because something broke. I ended up with the one with the rubber fingers because I didn't feel like spending another $45 on something that would probably break again. Not that I like spending $30 on a replacement item, but it's better than spending even more.
I took a photo of the issue. As far as I can tell, the end of the spring that you can see here, is actually supposed to be rotated 90 degrees and tucked into that plastic piece. This would provide tension to keep the tab closed. Right now there is no tension at all (open or closed), so you can close the lid and the tab, but it just pops open randomly when moved. I have tried many times to get it back where it needs to be. I just don't think it's possible. I think it's likely the spring used to be longer and broke off.
When I got them side by side, I noticed that that the newer (cheaper) one didn't have the same latch to hold the lid closed. It was just a (very tight) friction fit. I couldn't just pop it open. The whole lid has to be pressed/pried, but at least it doesn't have any moving parts on the latch itself. I would prefer a normal friction latch (that can be popped open, like the normal Spire lid or just about any other hopper lid), but at least this style shouldn't break like the last one.
I then realized that the little "fins" on both styles were removable. Just take out the four screws, pull off the top ring, and then the fingers (plastic or rubber) come right out. Great! I could just swap the spring loaded plastic fingers onto the new lid. NO! In a very Virtue-like move the top ring is different between the two and not interchangeable. So you can put the fingers in, but you need the matching top and bottom parts of the lid to make it work. So no buying the rubber finger version and swapping in plastic fingers later. You have to buy the whole thing.